結果

問題 No.1433 Two color sequence
ユーザー bond_cmprogbond_cmprog
提出日時 2021-03-19 22:05:36
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 39 ms / 2,000 ms
コード長 9,428 bytes
コンパイル時間 2,821 ms
コンパイル使用メモリ 196,912 KB
最終ジャッジ日時 2025-01-19 18:32:07
ジャッジサーバーID
(参考情報)
judge2 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 21
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include <stdio.h>
#include <bits/stdc++.h>
#define REP(i, n) for(int i = 0;i < n;i++)
#define ll long long
using namespace std;
typedef pair<int, int> P;
typedef pair<ll,ll> LP;
const int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1};
const int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1};
const int INF = 1000000000;
const ll LINF = 1000000000000000000;//1e18
const double PI = acos(-1.0);
const double EPS = 1e-10;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }
inline constexpr ll ceil_div(const ll a, const ll b) {return (a + b - 1) / b - !!((a + b - 1) % b < 0);}// return ceil(a/b)
inline constexpr ll floor_div(const ll a, const ll b) {return a / b - !!(a % b < 0);}// return floor(a/b)
/* ----------------------- DEBUG FUNCTION ---------------------------- */
#define DUMPOUT cerr
void dump_function() { DUMPOUT << ' '; }
void dump_function(bool a) { DUMPOUT << a; }
void dump_function(int a) { DUMPOUT << a; }
void dump_function(long long a) { DUMPOUT << a; }
void dump_function(char a) { DUMPOUT << a; }
void dump_function(string &a) { DUMPOUT << a; }
void dump_function(double a) { DUMPOUT << a; }
template <class T> void dump_function(const vector<T> &);
template <class T, size_t size> void dump_function(const array<T, size> &);
template <class T, class L> void dump_function(const pair<T, L> &p);
template <class T, size_t size> void dump_function(const T (&)[size]);
template <class T> void dump_function(const vector<T> &a) {
if(a.empty()) return;
dump_function(a[0]);
for(auto i = a.begin(); ++i != a.end();) {
DUMPOUT << " ";
dump_function(*i);
}
DUMPOUT << endl;
}
template <class T> void dump_function(const deque<T> &a) {
if(a.empty()) return;
dump_function(a[0]);
for(auto i = a.begin(); ++i != a.end();) {
DUMPOUT << " ";
dump_function(*i);
}
}
template <class T, size_t size> void dump_function(const array<T, size> &a) {
dump_function(a[0]);
for(auto i = a.begin(); ++i != a.end();) {
DUMPOUT << " ";
dump_function(*i);
}
}
template <class T, class L> void dump_function(const pair<T, L> &p) {
DUMPOUT << '(';
dump_function(p.first);
DUMPOUT << ",";
dump_function(p.second);
DUMPOUT << ')';
}
template <class T> void dump_function(set<T> &x) {
for(auto e : x) dump_function(e), DUMPOUT << " ";
DUMPOUT << endl;
}
template <class T> void dump_function(multiset<T> &x) {
for(auto e : x) dump_function(e), DUMPOUT << " ";
DUMPOUT << endl;
}
template <class T, size_t size> void dump_function(const T (&a)[size]) {
dump_function(a[0]);
for(auto i = a; ++i != end(a);) {
DUMPOUT << " ";
dump_function(*i);
}
}
template <class T> void dump_function(const T &a) { DUMPOUT << a; }
int dump_out() {
DUMPOUT << '\n';
return 0;
}
template <class T> int dump_out(const T &t) {
dump_function(t);
DUMPOUT << '\n';
return 0;
}
template <class Head, class... Tail> int dump_out(const Head &head, const Tail &... tail) {
dump_function(head);
DUMPOUT << ' ';
dump_out(tail...);
return 0;
}
#ifdef DEBUG_
#define dump(x)
     \
DUMPOUT << #x << ": ";
         \
dump_function(x);
         \
DUMPOUT << endl;
void dumps() {}
template <class T> void dumps(const T &t) {
dump_function(t);
DUMPOUT << " ";
}
template <class Head, class... Tail> void dumps(const Head &head, const Tail &... tail) {
dump_function(head);
DUMPOUT << ' ';
dump_out(tail...);
}
#else
#define dump(x)
template <class... T> void dumps(const T &...) {}
#endif
/* ----------------------- DEBUG FUNCTION ---------------------------- */
template<int MOD> struct Fp {
long long val;
constexpr Fp(long long v = 0) noexcept : val(v % MOD) {
if (val < 0) val += MOD;
}
constexpr int getmod() const { return MOD; }
constexpr Fp operator - () const noexcept {
return val ? MOD - val : 0;
}
constexpr Fp operator + (const Fp& r) const noexcept { return Fp(*this) += r; }
constexpr Fp operator - (const Fp& r) const noexcept { return Fp(*this) -= r; }
constexpr Fp operator * (const Fp& r) const noexcept { return Fp(*this) *= r; }
constexpr Fp operator / (const Fp& r) const noexcept { return Fp(*this) /= r; }
constexpr Fp& operator += (const Fp& r) noexcept {
val += r.val;
if (val >= MOD) val -= MOD;
return *this;
}
constexpr Fp& operator -= (const Fp& r) noexcept {
val -= r.val;
if (val < 0) val += MOD;
return *this;
}
constexpr Fp& operator *= (const Fp& r) noexcept {
val = val * r.val % MOD;
return *this;
}
constexpr Fp& operator /= (const Fp& r) noexcept {
long long a = r.val, b = MOD, u = 1, v = 0;
while (b) {
long long t = a / b;
a -= t * b, swap(a, b);
u -= t * v, swap(u, v);
}
val = val * u % MOD;
if (val < 0) val += MOD;
return *this;
}
constexpr bool operator == (const Fp& r) const noexcept {
return this->val == r.val;
}
constexpr bool operator != (const Fp& r) const noexcept {
return this->val != r.val;
}
friend constexpr istream& operator >> (istream& is, Fp<MOD>& x) noexcept {
is >> x.val;
x.val %= MOD;
if (x.val < 0) x.val += MOD;
return is;
}
friend constexpr ostream& operator << (ostream& os, const Fp<MOD>& x) noexcept {
return os << x.val;
}
friend constexpr Fp<MOD> modpow(const Fp<MOD>& r, long long n) noexcept {
if (n == 0) return 1;
auto t = modpow(r, n / 2);
t = t * t;
if (n & 1) t = t * r;
return t;
}
friend constexpr Fp<MOD> modinv(const Fp<MOD>& r) noexcept {
long long a = r.val, b = MOD, u = 1, v = 0;
while (b) {
long long t = a / b;
a -= t * b, swap(a, b);
u -= t * v, swap(u, v);
}
return Fp<MOD>(u);
}
};
template<class T> struct BiCoef {
vector<T> fact_, inv_, finv_;
constexpr BiCoef() {}
constexpr BiCoef(int n) noexcept : fact_(n, 1), inv_(n, 1), finv_(n, 1) {
init(n);
}
constexpr void init(int n) noexcept {
fact_.assign(n, 1), inv_.assign(n, 1), finv_.assign(n, 1);
int MOD = fact_[0].getmod();
for(int i = 2; i < n; i++){
fact_[i] = fact_[i-1] * i;
inv_[i] = -inv_[MOD%i] * (MOD/i);
finv_[i] = finv_[i-1] * inv_[i];
}
}
constexpr T com(int n, int k) const noexcept {
if (n < k || n < 0 || k < 0) return 0;
return fact_[n] * finv_[k] * finv_[n-k];
}
constexpr T fact(int n) const noexcept {
if (n < 0) return 0;
return fact_[n];
}
constexpr T inv(int n) const noexcept {
if (n < 0) return 0;
return inv_[n];
}
constexpr T finv(int n) const noexcept {
if (n < 0) return 0;
return finv_[n];
}
constexpr T perm(int n, int k) const noexcept {
if (n < k || n < 0 || k < 0) return 0;
return fact_[n] * finv_[n-k];
}
};
/* ----------------------------- MOD ----------------------------------- */
const int MOD = 1000000007;
const int MOD2 = 998244353;
using mint = Fp<MOD>;
BiCoef<mint> bc;
// using vec = vector<int>;
// using mat = vector<vec>;
/* ----------------------------- MOD ----------------------------------- */
/* ----------------------- AtCoder Library ---------------------------- */
// #include <atcoder/all>
// using namespace atcoder;
/* ----------------------- AtCoder Library ---------------------------- */
void solve(){
int N;
string S;
cin >> N >> S;
vector<ll> a(N);
REP(i,N) cin >> a[i];
ll res = 0;
{
ll ma = 0;
ll sum = 0;
ll ans = 0;
REP(i,N){
if(S[i] == 'R') sum += a[i];
else sum -= a[i];
chmax(ans, sum);
chmax(sum, 0LL);
}
ll mi = INF;
sum = 0;
ll ans2 = INF;
REP(i,N){
if(S[i] == 'R') sum += a[i];
else sum -= a[i];
chmin(ans2, sum);
chmin(sum, 0LL);
}
chmax(res, max(ans, -ans2));
}
{
ll ma = 0;
ll sum = 0;
ll ans = 0;
REP(i,N){
if(S[i] == 'R') sum -= a[i];
else sum += a[i];
chmax(ans, sum);
chmax(sum, 0LL);
}
ll mi = INF;
sum = 0;
ll ans2 = INF;
REP(i,N){
if(S[i] == 'R') sum -= a[i];
else sum += a[i];
chmin(ans2, sum);
chmin(sum, 0LL);
}
chmax(res, max(ans, -ans2));
}
cout << res << endl;
}
int main(){
cin.tie(0);
ios::sync_with_stdio(false);
solve();
// int T; cin >> T; REP(t,T) solve();
}
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